[8u60] review request for RT-22993: Native installer - allow user to choose installation directory

[Dmitry Cherepanov]

Danno,

Could you please review the fix for RT-22993

JIRA: https://javafx-jira.kenai.com/browse/RT-22993
Webrev: http://cr.openjdk.java.net/~dcherepanov/RT-22993/webrev.0

Thanks,
Dmitry